Why are viruses not considered living organisms by most people?

So were they ever alive? Most biologists say no. Viruses are not made out of cells, they can't keep themselves in a stable state, they don't grow, and they can't make their own energy. Even though they definitely replicate and adapt to their environment, viruses are more like androids than real living organisms.

Explanation:

Viruses are not considered living organisms because they require a host cell to replicate, unlike living organisms which can replicate on their own.